Improvement in smoke-stack heating apparatus



T. B.FIELD.

Smoke-Stank Heating-Apparatus.

No;l69.09 3. Patented0ct.26,18]5.

wl'ruzsss I INVENTOR STA'rns PA THOMAS 13. FIELD, OF OORNING, NEW YORK,AssIeNoR TOTMARY E. o.

FIELD, or SAME PLACE.

IMPROVEMENT IN SMOKE-STACK HEATING APPARATUS.

Specification forming part of Letters Patent No. 169,093, dated October26, 1875; application filed April 5, 1675.

To all whom it may concern 7 Be it known that I, THOMAS B. FIELD, ofCorning, in the county of Steuben and State of New York, have inventedcertain new and useful Improvements in Smoke-Stack Heating Apparatus;and I do hereby declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art towhich it pertains to make and use the same, reference being had to theaccompanying drawing, and to the letters of reference marked thereon,which form a part of this specification. This invention relates,primarily, to heating air for factory purposes and drykilns, but isapplicable also to heating water and superheating or drying steam.

The general objects of the invention are to utilize the heat of theescaping products of combustion in the smoke-stacks and smoke boxes ofstationary furnaces for the purpose above named, and to insure thecirculation of a forced current or blast of air or other fluid, in suchmanner as to cause it to absorb the greatest amount of heat possible inpassing through apparatus of given dimensions.

The invention consists in the combination, with a heating-drum of smalldiameter, arranged within the stack or smoke-boxof a stationary furnace,of one or more longitudinal pipes, open at bothends, and one or morelongitudinal fines and longitudinaland transverse partitions, to formthree or more compartments between the inner and outer heating-walls ofthe drum, and communicat ing with induction and eduction pipes, wherebya circulation of the air-currents of the chamber is produced both upwardand downward in contact with both inner and outer highly-heatedwalls'directly within the flue through which the products of combustionpass.

In the accompanying drawings, Figure 1 represents a verticallongitudinal section of a steam; boiler furnace, illustrating theapplication of my smoke-stack heating-drum; Fig. 2, a horizontal sectionof the smoke-stack and drum, and Fig. '3 a vertical transverse sectionon the line 2 2 of Fig. 2.

A hot-air drum, 0, is arranged within the benefit of an interior heatedsurface or sur-.

faces forthe hot air drum, by causing the products of combustion to passthrough the drum while enveloping the shell-surface. In con-- nectionwith the longitudinal pipes I also construct the drum with longitudinallines 61 f g, and longitudinal and transverse partitions h i, in amanner to form three or more compartments within the drum, two of which,fg, being on one side of the central partition h, and formed by thehalf-circle partition '5, and communicating at top and bottom with theflue d, which extends the whole length of the drum.

The induction and eduction pipes j 70 enter the fluesfg on oppositesides of the transverse partition e', and the air or water is caused bysaid partition to rise in the flue or compartmentf, and, descending theline 01, rises in the compartment g, which communicates with theeduction-pipe k, and is conveyed to the point where needed. A'blower, l,is combined with the induction-pipe j, to force the air at high speedthrough the same.

Water can be forced into and heated in the drum-chamber by using a-pump,check-valve, steam-gage, and safety-valve.

The induction and eduction pipes may be placed at a higher or lowerpoint in the stack or chimney at pleasure, but the transverse partitionmust be located between them.

The heating-drum can be arranged in the smokebox, or partly in thesmoke-box and the smoke-stack or chimney, or in smoke-stack or chimney.I

The air can be entered at the top and pass out at the bottom of thestack, or it may be received from the bottom and pass out from the top.

The device is equally applicable to stovepipes for heating rooms.

I claim- The smoke-stack or chimney-heatin g drum 0,

provided with one or more longitudinal pipes,

mend constructed with longitudinalflues d f i g, and longitudinal andtransverse partitions h i, to form three or more compa'rtmentsbetweenthe inner and outer heatingwalls of the d rum, and communicating withinduction and eduction pipes, as and for purpose set forth.

In testimony that I claim the foregoing as my own I have afiixed mysignature in presence of two witnesses.

THOMAS B. FIELD.

Witnesses:

OYRUs S. H001), ED. H001).

